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| author | Tobias Brunner <tobias@strongswan.org> | 2011-10-13 11:10:05 +0200 |
|---|---|---|
| committer | Tobias Brunner <tobias@strongswan.org> | 2011-10-13 11:21:57 +0200 |
| commit | 5051bd23eb81c8ac53a0966badcd6a02479f3601 (patch) | |
| tree | 59544c63de0ca7665591d708c1abb5bd96abff03 /src/libstrongswan/utils.c | |
| parent | 652ddf5ce2fad08f6569096dd56a821500cc5ba4 (diff) | |
| download | strongswan-5051bd23eb81c8ac53a0966badcd6a02479f3601.tar.bz2 strongswan-5051bd23eb81c8ac53a0966badcd6a02479f3601.tar.xz | |
Only close open file descriptors on Linux.
Diffstat (limited to 'src/libstrongswan/utils.c')
| -rw-r--r-- | src/libstrongswan/utils.c | 27 |
1 files changed, 26 insertions, 1 deletions
diff --git a/src/libstrongswan/utils.c b/src/libstrongswan/utils.c index eca613a5d..7ad948f70 100644 --- a/src/libstrongswan/utils.c +++ b/src/libstrongswan/utils.c @@ -28,6 +28,7 @@ #include "enum.h" #include "debug.h" +#include "utils/enumerator.h" ENUM(status_names, SUCCESS, NEED_MORE, "SUCCESS", @@ -199,7 +200,31 @@ bool mkdir_p(const char *path, mode_t mode) */ void closefrom(int lowfd) { - int maxfd, fd; + char fd_dir[PATH_MAX]; + int maxfd, fd, len; + + /* try to close only open file descriptors on Linux... */ + len = snprintf(fd_dir, sizeof(fd_dir), "/proc/%u/fd", getpid()); + if (len > 0 && len < sizeof(fd_dir)) + { + enumerator_t *enumerator = enumerator_create_directory(fd_dir); + if (enumerator) + { + char *rel, *end; + while (enumerator->enumerate(enumerator, &rel, NULL, NULL)) + { + fd = atoi(rel); + if (fd >= lowfd) + { + close(fd); + } + } + enumerator->destroy(enumerator); + return; + } + } + + /* ...fall back to closing all fds otherwise */ maxfd = (int)sysconf(_SC_OPEN_MAX); if (maxfd < 0) { |